It happened on Nov. 1 at 10:25 p.m. at the 125th Street and Lexington Avenue station.
Surveillance video shows the attacker hit the 36-year-old woman, knocking her to the ground and dragging her out of the elevator by her feet.
Police say he stole $50 from her and took off.
The victim suffered swelling to her face but refused medical attention.
Authorities are still trying to find the attacker. Anyone with information in regard to this incident is asked to contact the NYPD.
MORE | Video shows officers race through Brooklyn to save 1-year-old's life